Datasheet

Registers STA309A
30/67 Doc ID 13855 Rev 4
The Postscale function can be used for power-supply error correction. For multi-channel
applications running off the same power-supply, the postscale values can be linked to the
value of channel 1 for ease of use and update the values faster.
For ease of use, all channels can use the biquad coefficients loaded into the channel 1
coefficient RAM space by setting bit BQL to 1. Therefore, any EQ updates only have to be
performed once.
Table 30. PSL bit
Bit RW RST Name Description
3 RW 0 PSL
Postscale link:
0: each channel uses individual postscale value
1: each channel uses channel 1 postscale value
Table 31. BQL bit
Bit RW RST Name Description
4RW 0 BQL
Biquad link:
0: each channel uses coefficient values
1: each channel uses channel 1 coefficient values
Table 32. PWMS bits
Bit RW RST Name Description
7:5 RW 00 PWMS[2:0] PWM speed selection
Table 33. PWM output speed
PWMS[1:0] PWM output speed
000 Normal speed (384 kHz) (all channels
001 Half-speed (192 kHz) (all channels
010 Double-speed (768 kHz) (all channels
011 Normal speed (channels 1-6), double-speed (channels 7-8)
100 Odd speed (341.3 kHz) (all channels)